SPLITTING THE MORNING MEAL IN TWO
SEIF 3
If someone's morning meal stretches until Mincha time, he can split the meal in two in order to fulfill the Mitzvah of Shaalos Seudos. The Rosh explains that this it is advisable to do so, since if one were to eat a large meal, he might be too full to eat Shaalos Seudos at a later time. Rather, he should split up the meal and eat while he still has his appetite. (Sometimes a person can eat a large meal at one time, but waiting until later might ruin his appetite and he would be too full to eat another meal.)
Read more...