Rice Cooker Super Cheesy Polenta

Ingredients (10)

• ✓ 2 tablespoons butter
• + ½ onion, chopped add to pantry
• ✓ 1 clove garlic, minced
• + 1 cup chicken broth add to pantry
• + 1 cup milk add to pantry
• + ½ cup polenta add to pantry
• + ¼ teaspoon salt, or more to taste add to pantry
• ✓ 2 ounces shredded Cheddar cheese
• + 2 ounces shredded Parmesan cheese add to pantry
• + ¼ teaspoon freshly ground black pepper add to pantry