Preheat oven to 375 F (191 C).
Cut the Green Peppers in half (remove stem and seeds).
Cover a baking sheet with parchment paper and place peppers cut-side down; bake in the oven for 20 - 25 minutes. You should be able to easily poke a fork into the pepper when done.
Add diced onions to a medium-low heat pan and saute for ~ 5 minutes.
Add diced tomatoes; simmer for 3 - 5 minutes.
Add water and TVP to tomato mixture.
Add in your Nutritional Yeast and spices, stirring regularly.
Continue stirring and flipping TVP; it should be browning and becoming crumbly.
Once TVP is the correct texture, turn off heat and stir in feta crumbles.
Once peppers and TVP are done, flip the peppers over and fill with TVP.
Sprinkle shredded cheese on top.
Put back in the oven and broil for 3 - 5 minutes until shredded cheese has melted.