Cut the sheep's cheese into small cubes. Rinse lemon hot, grate dry. Peel 1/4 of the lemon thinly and cut into fine strips. Squeeze the lemon. Rinse basil, dab dry and cut into fine strips except for a few leaves. Mix cheese, basil strips, lemon peel, 1 teaspoon lemon juice, salt, pepper and oil in a bowl. Marinate the cheese for about 10 minutes
Wash the peppers, cut them lengthwise and remove the seeds. Stuff the pepper halves with marinated sheep's cheese and arrange with the remaining basil and pumpernickel