TIP: These burgers can be made in advance and frozen for a quick lunch, dinner or weekend meal. Just thaw for 30 minutes before following cooking instructions.
- Heat olive oil in a frying pan.
- Add onions and cook over low-medium heat until soft, browned and caramelized, 20 minutes. Remove from heat and set aside to cool.
- While onions are cooking, break up bread into little pieces. Add milk and set aside to soak through, 5 minutes.
- Place turkey, lentils, bread mixture, egg, garlic, Worcestershire sauce, oyster sauce and onions in a bowl.
- Season with salt and pepper.
- Gently mix together until ingredients are thoroughly combined. Be careful not over mix to keep the burgers moist.
- Divide mixture into 8 even portions. Roughly shape into a ball. Press cheese into the middle and then mold mixture around it completely covering. Flatten into a patty shape. Place on sheets of wax paper.
- Refrigerate for at least 30 minutes up to overnight. This will help patties hold their shape when cooking.
- Pre-heat your oven to 350 degrees Celsius or 177 degrees Fahrenheit.
- Heat a non-stick pan over medium heat.
- Add patties and cook over medium heat until browned, 2-4 minutes per side.
- Transfer to the oven and cook an additional 10-15 minutes until burgers are cooked through and an instant read thermometer reads 165 degrees Celsius or 74 degrees Fahrenheit.