Created by dienia b on May 20, 2020
Step 1: In a bowl
Step 2: Combine flour and baking powder.
Step 3: Then add the eggs one by one,
Step 4: The melted butter, grainy mustard and the milk.
Step 5: Mix
Step 6: Add the Gruyère, then crumbled tuna.
Step 7: Pour into a silicone mold or buttered cake pan.
Step 8: Bake for 45 minutes at 375 Fahrenheit °.