INGREDIENTS
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2 large portabella mushrooms
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olive oil for brushing the caps
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10 ounces fresh baby spinach leaves, steamed and squeezed dry or 5 -6 ounces chopped frozen spinach, thawed and squeezed dry
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1 egg, lightly beaten
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1/4 cup sour cream
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1 green onion, finely sliced
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1/2 cup crushed croutons, either homeade or good quality store bought
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1/4 cup crumbled feta cheese
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1/4 teaspoon granulated garlic or garlic powder
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1/4 teaspoon salt
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1/4 teaspoon black pepper
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1 cup shredded mozzarella cheese, divided