Bash variable within single and double quote

Given I have the following env variables declared:

MY_VARIABLE_HERE=myValue
SECOND_VARIABLE=secondValue

How can I retrieve these variable within a single quote, wrapped in double quote. i.e. the following

echo '<tag><action name="$MY_VARIABLE_HERE" value="$SECOND_VARIABLE"/></tag>' > my_text.txt

So the expected output for the my_text.txt
would be

<tag>
  <action name="myValue" value="secondValue" />
</tag>

>Solution :

echo '<tag><action name="'${MY_VARIABLE_HERE}'" value="'${SECOND_VARIABLE}'"/></tag>' > my_text.txt