To test this hypothesis and clarify whether glucose, insulin and GLP-1 postprandial responses are different in the morning vs. in the afternoon, the investigators will compare in T2D subjects in random order and in two separate days: the glucose, insulin and GLP-1 postprandial responses after breakfast, lunch and dinner with 2 isocaloric meal plans or test diets, that differ in meal timing distribution The investigators hypothesize that GLP-1 and insulin response after high calorie breakfast will be higher in comparison to GLP-1 and insulin response after identical meal at evening