Meals While Pregnant

Okay what do you ladies eat to keep you full until your next meal? I work at an elementary school & it's hard to be snacking constantly but I'm always starving! I eat breakfast about 7am and by 9am I'm starving! But lunch isn't until 11:30am then after work I'm starving & usually over eat, then not hungry for dinner but by 9-10pm I'm starving again! I'm aware that meals should be smaller & more frequent but what do you eat to help you get from meal to meal with only a few snacks (I usually do apple sauce or crackers)? Meal ideas & snack ideas that are easy to take to work?