Rinse and cook the rice and quinoa to the package directions, once done, set aside.
Cook the oats to the package direction, once done, set aside.
Add oil to a medium sized skillet, set aside.
Clean and dice the bell pepper and onion, add to the skillet along with the minced garlic.
Cook the vegetables on a medium heat until soft and slightly browned, remove from the heat and set aside.
In a medium sized mixing bowl, add the cooked oats, rice, quinoa, vegetables, and stir until combined.
Next add all the seasonings, maple syrup, liquid aminos, and chickpea flour, stir until well combined.
Preheat the oven to 400° F.
Prepare a glass 8x9 baking dish with parchment paper, pour the mixture into the baking dish, forming the mixture into what resembles a roast.
Cover with foil, place into the oven, and bake for 30 minutes.
After 30 minutes, remove the foil, and continue baking for a additional 20 to 30 minutes.
Note: If adding sauteed onion and mushrooms, pour this on the roast before baking the last 20 to 30 minutes.
Continue baking until the inside temperature of the roast reaches 160° F.
Once the roast temperature reaches 160° F, remove from the oven and let the roast rest for about 15 to 20 minutes before cutting.
Serve with roasted vegetables, mushrooms, and gravy.