- Step 1
Preheat oven to 220C/200C fan-forced.
- Step 2
Melt butter in a large saucepan over medium heat until foaming. Add flour. Cook, stirring with a wooden spoon, for 1 minute or until bubbling. Remove from heat. Add milk, 1⁄4 cup at a time, stirring constantly. Return pan to heat. Cook, stirring, for 5 minutes or until mixture bubbles and thickens. Remove from heat.
- Step 3
Add onion, tuna, peas, lemon rind, lemon juice, mustard and rice to sauce. Season well with salt and pepper. Stir to combine. Spoon rice mixture into a greased 8-cup- capacity baking dish. Smooth top. Sprinkle with bacon and cheese.
- Step 4
Bake for 25 to 30 minutes or until bacon is golden and crisp. Stand for 5 minutes. Serve with lemon wedges.
You'll need to cook about 1 cup white long-grain rice.