Crack two eggs into a medium-sized bowl. Add the garlic, salt, and pepper to your preferences. Then, using a fork or a whisk, beat the eggs lightly until the yolks are broken and well combined with the whites.
Coat the bottom of your pan with oil/nonstick spray and turn the heat to medium. Pour the beaten eggs into the pan (they should easily cover the bottom of the pan without you having to spread them). Cover with a lid and cook until bubbly and almost cooked through (not much jiggle if you shake the pan), or about 2-3 minutes.
Once your eggs are almost cooked through, start delicately slipping a spatula under them until the spatula can pick it up and flip it back into the pan.
Turn the heat down to its lowest setting and add the cheese to half of your omelette. Replace the lid to melt the cheese.
Once the cheese is melted, add your bell pepper, tomato, and deli meat on top of it. (I like to put the lid back on one more time to steam the veggies a bit and melt them in, but you do not have to do that).
Your egg is done! Fold the half of the omelette that doesn't have stuff on it over the top of your cheese and vegetable filling and slide it gently out of the pan.