Yellow Plantain Boats Stuffed with Beef Picadillo (Canoas de Platano Relleno de Carne Molida)

2 cups corn oil
6 ripe but firm yellow plantains, peeled
1 recipe beef picadillo
1/4 pound Cheddar cheese, shredded

Preheat the oven to 350 F. Heat the oil in a frying pan and fry the plantains until golden brown. Drain on paper towels. Make a slit in each plantain from top to bottom. Fill each with 2-1/2 tablespoons of the picadillo. Sprinkle the cheese on top. Bake for 15 minutes, or until heated through.