Portobello Breakfast Cups

Name: Portobello Breakfast Cups
Ingredients: * 4 large portobello mushroom, stem removed; * 2 tbsp olive oil, divided; * 1/2 large sweet onion, chopped; * 1 bell pepper (red, yellow, orange, etc ), chopped; * 1 zucchini, chopped; * 3 clove garlic, finely chopped; * large handful chopped kale, approx 1 cup loosely packed; * 1 chicken sausage, sliced; * 1/4 cup 75% reduced fat cheddar cheese (or whatever cheese you want; to use, or no cheese if you wish); * 4 egg; * salt and pepper to taste; * chalulah for topping, optional