Cut the crusts off the bread then cut both pieces of bread into the same shape as Phineas's head. In the top slice cut in his mouth. Flip the bread open and butter the inside.
On the bottom slice of bread, layer the meat and two slices of cheese, to look like his teeth (see the photo). Then cut the last slice into two round circles, butter the back of the olive halves then stick them to the cheese circles to make his eyes. Pin these in place with a toothpick then set on his carrot hair.
Tada! You are now official the coolest mum ever.
This would look cool on top of a lettuce leaf. You could also use orange cheese for his hair if you have some. Get creative.