1. Have Canned Baked Beans in possession.
2. Hold down 'G' (without letting go).
3. Select 'Eat All' with the mouse wheel.
4. Your character will instantly consume the entire contents of the can.
Works with timed items as well, like bandages and water bottles.
UPDATE:
1. Have any one-handed item in your hands.
2. Hold down 'G' (without letting go).
3. Press 'F' repeatedly under an apple tree.
4. Shower yourself in apples.