Wash the salad leaves, dry them and put them on a serving dish.
Wash, dry and cut the tomato into strips.
Spread it on the lettuce leaves.
Spread the tuna slices on the tomatoes.
Lay out the corn, some of the greens. In the summer, juicy fresh greens, I think it is not necessary to chop it, tear it into smaller fragments.
In a saucepan, mix the butter with the mustard.
Season the salad with the sauce and season with salt.
Add the remaining herbs and serve.