Wash your summer squash(zucchini). Remove the stem end and slice them length-wise.
4 medium sized summer squash or zucchini (green and yellow)
Wash the bell peppers and cut off the tops. Then, cut each pepper in half, length-wise. Scoop out the seeds and white ribs.
1 red bell pepper, 1 yellow bell pepper
Peel the onions and slice them in half length-wise.
2 medium size onions
Preheat your outdoor grill to high.
Brush the cut sides of the zucchini, peppers and onions with olive oil; season with salt, pepper and the oregano.
olive oil for brushing onto the vegetables, salt and pepper to taste, 1/2 teaspoon dried oregano
Grill the vegetables cut side down, for approximately 7 minutes, rotating the vegetables halfway through so that you can get some nice grill marks on them.
Flip the vegetables, brush them with oil, and grill for an additional 2 minutes.
Remove the zucchini from the grill; the peppers and onions might require an additional few minutes. The vegetables are to be fork tender.
Remove the vegetables from the grill and set them aside until they are cool enough to handle. Then, cut the vegetables into one inch pieces and place them in a bowl.
To the vegetables, add the dressing ingredients one at a time; add the 1/2 teaspoon salt, the olive oil, lemon juice, red wine vinegar, basil, parsley and ground black pepper.
1/2 teaspoon salt, 1/4 cup olive oil, 2 tbsp lemon juice, 2 teaspoons red wine vinegar, 1/4 cup chopped fresh basil, 1/4 cup chopped fresh flat leaf parsley, ground black pepper to taste
Toss gently to combine.
Serve immediately and enjoy.