INGREDIENTS
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6 (~8 oz.) russet potatoes
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2 Tbsp. olive or grapeseed oil, divided
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1 medium onion, diced
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4 cloves garlic, minced
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1/8 - 1/4 tsp. red pepper flakes
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1 lb. sweet or spicy Italian sausage (we use chicken), removed from casings
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2.25 cups marinara sauce
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6 oz. baby spinach
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1/2 cup Mascarpone cheese
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1/2 cup grated Parmesan or Romano cheese, plus more for serving
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3 Tbsp. chopped basil