Heart Sandwiches:

Make mini-heart sandwiches by cutting out bread hearts with a heart-shaped cookie cutter. Make pink cream cheese by adding a few drops of red food coloring to cream cheese. Spread the cream cheese on the bread. Decorate with slivers of red pepper.
Make larger sandwiches by cutting the bread with a larger heart-shaped cookie cutter. Fill the sandwiches with tuna salad, egg salad, or peanut butter and jelly

Valentine Pizza:

Shape ready-made pizza dough into heart shapes.
Spread with tomato sauce, shredded cheeses, and whatever pizza toppings you like, and bake.