You can make him soup. Making veggie soup is really easy, since you don't need a recipe. Every time I make veggie soup it's different.
Last time, mom and I used tomato paste, tomato chunks, celery, sauted onions, potatos, carrots, bay leaves, barley, and I think that was it.
The thing is, when you use carrots in soup, you either have to cook them last, or cook them seperately and add them last because carrots have a very strong flavor. If you cook them first, and add all the ingredients in with them right away, your whole soup will taste like carrots.
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You can make campbell's tomato soup.
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Eggplant parmesian, which i don't have a recipe for, but I'm sure you can find one online
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potato soup, which I have a recipe for, but the recipe I have has chicken in it
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broccoli and cheese soup. yum. Mom has a recipe for that one, but I'm not sure where it is.
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rice and beans. If your boyfriend is picky, tell him to grow up and get over it. If he is going to make you cook for him, he should eat and be thankful or make his own food.