Not quite sure hot to title this?

If you let your younger toddler (no utensils yet) feed him/herself, how long does it take? How long is a mealtime? When do you decide it's over?

K is the slowest eater! If I am letting her feed herself (i.e. bread, noodle, fruit, etc.) she can seriously take her sweet time! We've been eating the same piece of french toast for over an hour because she loves to nibble on it. And when I try to clean up and take it away, she still wants it. I think my limit is 1.5 hr for one meal!