diff --git a/homeassistant/components/pvoutput/sensor.py b/homeassistant/components/pvoutput/sensor.py
index 512fb75067b..1d8b3400d8b 100644
--- a/homeassistant/components/pvoutput/sensor.py
+++ b/homeassistant/components/pvoutput/sensor.py
@@ -25,7 +25,6 @@ from homeassistant.const import (
 )
 from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
-from homeassistant.helpers.template import Template
 
 _LOGGER = logging.getLogger(__name__)
 _ENDPOINT = "https://pvoutput.org/service/r2/getstatus.jsp"
@@ -60,10 +59,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
     method = "GET"
     payload = auth = None
     verify_ssl = DEFAULT_VERIFY_SSL
-    headers = {
-        "X-Pvoutput-Apikey": Template(api_key, hass),
-        "X-Pvoutput-SystemId": Template(system_id, hass),
-    }
+    headers = {"X-Pvoutput-Apikey": api_key, "X-Pvoutput-SystemId": system_id}
 
     rest = RestData(hass, method, _ENDPOINT, auth, headers, None, payload, verify_ssl)
     await rest.async_update()
diff --git a/homeassistant/components/rest/__init__.py b/homeassistant/components/rest/__init__.py
index ba101624673..b55d9c6d844 100644
--- a/homeassistant/components/rest/__init__.py
+++ b/homeassistant/components/rest/__init__.py
@@ -25,7 +25,7 @@ from homeassistant.const import (
     SERVICE_RELOAD,
 )
 from homeassistant.core import HomeAssistant, callback
-from homeassistant.helpers import discovery
+from homeassistant.helpers import discovery, template
 from homeassistant.helpers.entity_component import (
     DEFAULT_SCAN_INTERVAL,
     EntityComponent,
@@ -37,7 +37,6 @@ from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 from .const import COORDINATOR, DOMAIN, PLATFORM_IDX, REST, REST_DATA, REST_IDX
 from .data import RestData
 from .schema import CONFIG_SCHEMA  # noqa: F401
-from .utils import inject_hass_in_templates_list
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -161,7 +160,8 @@ def create_rest_data_from_config(hass, config):
         resource_template.hass = hass
         resource = resource_template.async_render(parse_result=False)
 
-    inject_hass_in_templates_list(hass, [headers, params])
+    template.attach(hass, headers)
+    template.attach(hass, params)
 
     if username and password:
         if config.get(CONF_AUTHENTICATION) == HTTP_DIGEST_AUTHENTICATION:
diff --git a/homeassistant/components/rest/data.py b/homeassistant/components/rest/data.py
index bc98b0caf68..7c8fd61e688 100644
--- a/homeassistant/components/rest/data.py
+++ b/homeassistant/components/rest/data.py
@@ -3,7 +3,7 @@ import logging
 
 import httpx
 
-from homeassistant.components.rest.utils import render_templates
+from homeassistant.helpers import template
 from homeassistant.helpers.httpx_client import get_async_client
 
 DEFAULT_TIMEOUT = 10
@@ -52,8 +52,8 @@ class RestData:
                 self._hass, verify_ssl=self._verify_ssl
             )
 
-        rendered_headers = render_templates(self._headers, False)
-        rendered_params = render_templates(self._params, True)
+        rendered_headers = template.render_complex(self._headers, parse_result=False)
+        rendered_params = template.render_complex(self._params)
 
         _LOGGER.debug("Updating from %s", self._resource)
         try:
diff --git a/homeassistant/components/rest/switch.py b/homeassistant/components/rest/switch.py
index 1fd04b66559..3e5fd7e2c68 100644
--- a/homeassistant/components/rest/switch.py
+++ b/homeassistant/components/rest/switch.py
@@ -24,10 +24,8 @@ from homeassistant.const import (
     CONF_USERNAME,
     CONF_VERIFY_SSL,
 )
+from homeassistant.helpers import config_validation as cv, template
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
-import homeassistant.helpers.config_validation as cv
-
-from .utils import inject_hass_in_templates_list, render_templates
 
 _LOGGER = logging.getLogger(__name__)
 CONF_BODY_OFF = "body_off"
@@ -92,7 +90,9 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
         body_on.hass = hass
     if body_off is not None:
         body_off.hass = hass
-    inject_hass_in_templates_list(hass, [headers, params])
+
+    template.attach(hass, headers)
+    template.attach(hass, params)
     timeout = config.get(CONF_TIMEOUT)
 
     try:
@@ -207,8 +207,8 @@ class RestSwitch(SwitchEntity):
         """Send a state update to the device."""
         websession = async_get_clientsession(self.hass, self._verify_ssl)
 
-        rendered_headers = render_templates(self._headers, False)
-        rendered_params = render_templates(self._params, True)
+        rendered_headers = template.render_complex(self._headers, parse_result=False)
+        rendered_params = template.render_complex(self._params)
 
         async with async_timeout.timeout(self._timeout):
             req = await getattr(websession, self._method)(
@@ -233,8 +233,8 @@ class RestSwitch(SwitchEntity):
         """Get the latest data from REST API and update the state."""
         websession = async_get_clientsession(hass, self._verify_ssl)
 
-        rendered_headers = render_templates(self._headers, False)
-        rendered_params = render_templates(self._params, True)
+        rendered_headers = template.render_complex(self._headers, parse_result=False)
+        rendered_params = template.render_complex(self._params)
 
         async with async_timeout.timeout(self._timeout):
             req = await websession.get(
diff --git a/homeassistant/components/rest/utils.py b/homeassistant/components/rest/utils.py
deleted file mode 100644
index f3fdba651ac..00000000000
--- a/homeassistant/components/rest/utils.py
+++ /dev/null
@@ -1,27 +0,0 @@
-"""Reusable utilities for the Rest component."""
-from __future__ import annotations
-
-from homeassistant.core import HomeAssistant
-from homeassistant.helpers.template import Template
-
-
-def inject_hass_in_templates_list(
-    hass: HomeAssistant, tpl_dict_list: list[dict[str, Template] | None]
-):
-    """Inject hass in a list of dict of templates."""
-    for tpl_dict in tpl_dict_list:
-        if tpl_dict is not None:
-            for tpl in tpl_dict.values():
-                tpl.hass = hass
-
-
-def render_templates(tpl_dict: dict[str, Template] | None, parse_result: bool):
-    """Render a dict of templates."""
-    if tpl_dict is None:
-        return None
-
-    rendered_items = {}
-    for item_name, template in tpl_dict.items():
-        if (value := template.async_render(parse_result=parse_result)) is not None:
-            rendered_items[item_name] = value
-    return rendered_items
diff --git a/homeassistant/helpers/template.py b/homeassistant/helpers/template.py
index d460e7ab42b..0ba1d6bfa14 100644
--- a/homeassistant/helpers/template.py
+++ b/homeassistant/helpers/template.py
@@ -110,18 +110,25 @@ def attach(hass: HomeAssistant, obj: Any) -> None:
 
 
 def render_complex(
-    value: Any, variables: TemplateVarsType = None, limited: bool = False
+    value: Any,
+    variables: TemplateVarsType = None,
+    limited: bool = False,
+    parse_result: bool = True,
 ) -> Any:
     """Recursive template creator helper function."""
     if isinstance(value, list):
-        return [render_complex(item, variables) for item in value]
+        return [
+            render_complex(item, variables, limited, parse_result) for item in value
+        ]
     if isinstance(value, collections.abc.Mapping):
         return {
-            render_complex(key, variables): render_complex(item, variables)
+            render_complex(key, variables, limited, parse_result): render_complex(
+                item, variables, limited, parse_result
+            )
             for key, item in value.items()
         }
     if isinstance(value, Template):
-        return value.async_render(variables, limited=limited)
+        return value.async_render(variables, limited=limited, parse_result=parse_result)
 
     return value