Prepare the hamburger buns and set aside.
Add the oil or butter to a large skillet or dutch oven and heat over medium-high heat.
Once hot, add the beef and cook until brown, breaking it up with a wooden spoon as it cooks. Drain off the fat if desired.
Add the green pepper and cook until tender, 3 to 5 minutes.
Dairy-Free Meatballs (Keto & Paleo Friendly!)
Keto Chicken Enchilada Casserole
Low-Carb Keto Flatbread - No Cheese!