Preheat oven to 400F and line a large baking sheet with parchment paper. Place mini peppers in a single layer, cut-side up and roast for 15 minutes. Remove from oven.
In a large skillet over medium heat, brown ground beef with onion until just cooked through, about 7 minutes.
Add Homemade Taco Seasoning and sauté until well combined. Remove from heat.
Make the cheese sauce - In a medium pot, add butter.
Melt over medium to high heat, and add rice flour and cook it for about a minute.
Whisk in milk, chicken stock and bring it to a boil.
Wait for the mixture to thicken and remove the pot from the heat and add in cheese mixture and mix well.
Salt and pepper cheese sauce to taste. Add in dashes of hot sauce, if desired.
Pack ground beef mixture into the wells of each pepper. Return to oven to heat meat through for about 5-10 minutes.
Remove from oven and top with cheese sauce and desired garnishes. Serve immediately. Say Grace and enjoy!