Chorizo Frittata

Name: Chorizo Frittata
Ingredients: 2 tbsp olive oil (divided); 100 grams chorizo (3-3.5 oz, I used semi-cured, half diced and half sliced into full circles); 1 red bell pepper (I used elongated horn peppers, half sliced into full circles and half diced); 1/2 onion (diced); 1/4 tsp salt; 10 cherry tomatoes (sliced in 3 circles each); 1 garlic clove (minced or finely diced); For the egg mixture; 7 large eggs; 1/4 cup + 1 tbsp milk (your choice); 1/4 tsp pepper; 1/2 cup grated cheddar cheese (or tasty, mozzarella, or similar); Fresh herbs for garnish (I like parsley or basil)