"This keto-friendly, nut-free, and gluten-free Philly cheesesteak casserole is ready in just under an hour! It's low in carbs and absolutely delicious!..."
INGREDIENTS
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1 ½ lbs sirloin steak
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1 tbsp (14g) unsalted butter
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2 tsp (10g) minced garlic
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120g chopped green bell peppers
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8 oz white mushrooms, roughly chopped
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25g thinly chopped yellow onion
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1 egg
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1 cup (112g) shredded mozzarella cheese
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6 oz cream cheese, softened
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½ tsp black pepper
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¼ tsp salt
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5 oz provolone cheese slices