Chonky secret mustard AKA large yellow underwing 💛🪽... & a chonky not-so-secret mustard 😬
This species is an important pollinator of wildflowers, and it's larvae eat a whole range of herbaceous plants including dandelion, hawkweeds, and plantain.
To feed this chonk/give it something to eat other than your tomato plants, let a little of your garden grow wild.