Quesadilla (Beef, Vegetable or Chicken)

Name: Quesadilla (Beef, Vegetable or Chicken)
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: TexMex, Mexican
Ingredients: 6 - 8 flour tortillas ((20cm/8")); 2 cups (200g) shredded Monterey Jack cheese ((or other of choice) (Note 1)); 3/4 cup roughly chopped coriander/cilantro; 1 cup corn kernels ((frozen thawed or can drained)); ONE Filling of Choice, below ((beef, chicken or vegetable)); 1 tsp each onion powder, dried oregano, salt; 2 tsp each cumin powder, paprika; 1/4 tsp each black pepper, cayenne pepper (optional); 1/2 tbsp olive oil; 2 garlic cloves (, minced); 1/2 onion (, finely chopped); 500g / 1 lb ground beef / mince; 1 small red capsicum/bell peppers (, diced); 2 tbsp tomato paste; 1/4 cup (65 ml) water; 2 1/2 tbsp olive oil; 500 g/1 lb chicken thighs (, skinless boneless (Note 2)); 1 small onion (, quartered and sliced); 1 small red capsicum/bell pepper (, diced); 2 tbsp vegetable oil; 1 onion (, diced); 2 cloves garlic (, minced); 1 can of black beans, drained ((400g/14oz)); 1 capsicum/bell pepper (, diced (any colour)); 1 cup corn ((canned drained or frozen thawed)); 1/4 cup tomato paste