Add coconut oil and milk to your foods, it is super to keep blood sugar down, high in nutrition and good for digestion and cub appetite as it actually fills you up.
Brussels sprouts are high in protein, there is a variety of ways to cook it and to add into sauce and casseroles. As well as green peas, that also have the "happy stuff" in them, like cocoa.
Rutabaga is also high in fiber and protein as well as chock full of vitamin C, and you can slow cook it and grill it like fish sticks and use instead of meat.
Cauliflower is a great addition to stuff too, and you can actually mash it up and use it instead of potato mash, or add it into potato mash, it also has a high content of vitamins , fiber and nice amount of protein.