Boil pasta according to package directions, I like to cook mine a little al dente. Strain and set aside.
In the same pot on medium heat, add a little avocado oil, let it heat up, add in mushroom and bell pepper. Sauté for about 4-5 minutes until vegetables begin to soften.
Add in tomato sauce and combine well with vegetables and let it all come to a simmer, 2-3 minutes. Add in spinach and mix it in letting it wilt, this takes no longer than 1 minute.
Add in your lentil pasta, combine everything and enjoy!