There are so many kinds of lentils and other beans, there may be other varieties that appeal to her if she doesn’t line the brown kind.
For eg red lentils are the inside of brown, and taste different and have a completely different texture. They’re lovely as Turkish lentil soup, simple indian dal / lentil soup, khichdi / lentil and rice risotto, and this ottolenghi coconut curry soup (that tastes like a rich dal to me).
I found an older post where I linked some of my favorite legume recipes — maybe one of them will work for both of you. I also love Hoppin John (blackeyed peas and rice) which is very simple but so flavorful with so few ingredients.
