Begin by making the garlic aioli. Mix all ingredients in a dish and whisk or blend.
Sauté the onions and red pepper until cooked through and slightly browned. Set aside.
Bring the meat to room temperature. Season with salt, pepper and garlic powder. Mix well. Split into two portions, enough to cover the surface of the tortillas
Press the meat onto one side of the tortillas. Bring your grill top or pan to a high heat. Flip each tortilla onto the grill top, meat side down. Weigh down with cast iron pans if you have them. Cook for approx. 8 minutes until meat is cooked through and browned
Flip over each tortilla and top with onions, peppers and four slices of cheese per tortilla. Cover with a piece of foil so cheese melts on the top. You can also place under the broiler for a minute or two to get the cheese bubbly and melted
Remove from heat, fold into a taco and grab some napkins