I love this clean-out-the-vegetable bin side dish. It's a great way to use up that zucchini or red pepper before it's on the way out, and that collard green pesto? Whew! It's to die-for. I put my Southern spin on the Italian condiment by substituting pecans for pine nuts and adding collard greens in with the basil. Cousins, you've got to try it!
For the collard green pesto: Bring a pot of salted water to a boil. Add the collard greens and cook until the collards are bright green and tender, about 2 minutes. Drain the collards and plunge in an ice water bath to stop cooking. Drain.
With the motor running, drop the garlic through the chute of a food processor and process until minced. Remove the lid and add the collards, cheese, basil, pecans, lemon zest, crushed red pepper and salt. Pulse until finely chopped. Pour the oil through the chute and process until the desired consistency is reached. Add the lemon juice. Add 2 tablespoons water, 1 tablespoon at a time, to thin the pesto if necessary.
For the vegetables: Toss the asparagus, pepper, squash and zucchini with half of the pesto. Heat a grill or grill pan to medium-high heat. Grill the vegetables until browned and tender, 5 to 7 minutes. Transfer to a serving platter and drizzle with the remaining pesto. Garnish with the lemon zest, if desired.