It’s the start of salad season (especially in my apt which becomes a sauna pretty much the moment the sun comes out). Lettuce is a great food to help fill you up. Providing nutrients but very few calories. Use lettuce in salads, sandwiches, wraps, even pasta. My simplest salad dressing is just balsamic vinegar mixed with a little dijon mustard and fresh ground black pepper. To compare some of the popular lettuces check out the chart below:

Lettuce (250 ml)	Calories (kcal)	Calcium (mg)	Potassium (mg)	Magnesium (mg)	Beta carotene  (µg)	Fibre (g)
Iceburg	11	14	107	5	227	0.9
Romaine	10	20	146	8	3092	1.2
Mesclun	13	45	213	21	3599	1.1
Butterhead	8	20	138	8	1155	0.6