Sauté the onions over low heat for a few minutes until golden brown.
Add the lentils and water to a pot, as well as an optional dash of salt.
Cook the lentils over low heat for about 20 - 30 minutes, or until the lentils are soft and all the water has been absorbed.
While the lentils are cooking, cut the peppers in half lengthwise.
Remove the seeds from the peppers.
In a mixing bowl, combine the pizza sauce, basil, cumin, and oregano.
Preheat the oven to 350° F.
Once the lentils are finished cooking, gently mix them into the pizza sauce mixture.
Add the chopped onions and mix again.
Place the pepper halves face up on a parchment lined baking sheet.
Stuff the peppers with the lentil mixture.
Sprinkle on optional nutritional yeast seasoning.
Bake the peppers for about 25 minutes, or until soft.
Top the peppers with mashed avocado, vegan sour cream, or whatever else you'd like.
Dig in and enjoy!