Spray cooking spray or a drizzle of olive oil in a non stick skillet over medium heat, saute chopped tomatoes, red onion, bell pepper and garlic for ~5 minutes or until softened. Season with cumin, oregano and black pepper. Squeeze ½ lemon over vegetable mixture. Stir well to combine. Remove from heat.
Meanwhile toast the pita bread in the oven on 350 degrees for ~4 minutes or until lightly toasted but still soft (I sprayed mine first with an olive oil mist).
Spread 2 Tablespoons of hummus on each pita, top each with half of vegetable mixture, 1 Tablespoon of chopped kalamata olives and 1 Tablespoon of feta cheese. Garnish with chopped basil or cilantro (optional).
Recipe by Nutritious Eats at https://www.nutritiouseats.com/vegetarian-hummus-pita-pizza/