Pan-Grilled Tilapia with Lemon and Red Onion

Details

Ingredients

• ¼ large lemon
• 1 (6 ounce) tilapia fillet, patted dry
• salt and ground black pepper to taste
• 1 tablespoon extra-virgin olive oil
• 1 teaspoon butter, divided
• ¼ large red onion, coarsely chopped
• 1 teaspoon minced garlic
• 1 tablespoon grated fresh Parmesan cheese