Combing ingredients work best for me:
For breakfast, put oatmeal in your pancake mix with powdered milk. I used to add brownie mix into it in the past as it added much sweetness & flavor. This enabled me to use less maple syrup which, sad to say, is overly expensive.
For dinner meals such as a Mulligan stew, I often make enough for 3 or 4 bowls at one time. I put the unused portion in the fridge right away and have it the next day so that it doesn't spoil. Having grown up in New York, I've always enjoyed cheese in my soup. It adds an immense amount of flavor and helps fill you up. What I do is to put cheese on top of my soup just before I eat it. Don't put it in your pot when cooking as it will melt down to the bottom of the pot and kinda spoil the taste. Any cheese is good - Swiss, Lorraine, Cheddar - all good stuff.
A good combo meal which I like is to make burgers of ground beef with black beans + some barbecue sauce. It can supersize your burgers and add much flavor.
As for desserts, well, despite my advancing age (advancing? heck, let's say it right - OLD age!), I still have a sweet tooth. Nothing pleases me more than making my own smoothies or malts. Combine 1/2 cup of milk or 1/4 cup of half & half with any fruits such as banana, some fruit juice, perhaps plain yogurt, touch of honey, maybe even mixed nuts, 1/2 cup or more of cool whip, and put it into a blender = the result will be very yummy & nutritious. And it is so much cheaper than what you buy at a store. On a couple of occasions, I have bought strawberry cupcakes or jelly rolls on sale (usually 10 for $10) and found that if you add it into your blender when making a smoothie, it adds sweetness, flavor, and helps supersize it.