280 g Grape or cherry tomatoes, halved
1/2 Small red onion
3 Zucchini, cut lengthwise into 1/4-in.-thick slices
3/4 tsp. Salt, divided
4 Pork loin chops, about 3/4-in. thick
1 tbsp. Lemon zest
1 tbsp. Minced shallot
1/4 cup Chopped fresh basil
1/2 cup Butter, at room temperature