How do you cook for a picky SO?

He is extremely picky. He hates shrimp, lobster, scrambled eggs, and the list goes on. He will only eat certain cuts of meat , pick at it through dinner and throw the parts he doesn't want away. I will cook a meal for us, he will refuse to eat it. Then I will cook for myself and he will devour the whole pan of food. It annoying because I do meal preps weekly. I will get frustrated with his refusal to eat so I will only cook enough for myself and enough to place in containers as my meal prep options. He then decides he likes it and devours all of the food leaving nothing for my meal preps. I can't plan with him. He then complains that I don't make a plate for him if I don't reserve him a portion of my the meal I made. How the hell am I supposed to meal prep when he eats what he chooses? I hate wasting food and not making enough food!! How the hell do I meal plan with him???

I really don't want to cook for him anymore but if I don't he will waste away to nothing because he won't cook for himself. Mind you, I love cooking. I absolutely love it!!! I just hate cooking for such a picky eater. He used to do this as a child with his mom. He is such a spoiled rich kid. How do I deal without nagging him to death???? I know he's a grown man and I can't dictate his eating habits, but cooking for him is a pain! So much food is wasted and I am all about saving money!