The cross-section between high volume and easy to make
Vegan replacement products? Easier to make than animals, but low volume so it’s more expensive than it needs to be (and often in a higher tax bracket, classified as candy or whatever)
Eggs? Needs healthy animals
Bananas are clones of each other. Might become an issue at some point, might not. Apples, too, but there’s many more variants
Maize, tomatoes, potatoes? Grown by the bazillion, cheap, afaik needn’t be clones of each other to get (something close enough to) the desired product
Rice? The pre-boiled stuff is afaik around the same price as the raw product, that’s how large the volumes are
The cross-section between high volume and easy to make