Bell Peppers
Grill: Grill peppers over high until charred all over, 15 to 18 minutes, turning occasionally. Place in a bowl and cover with plastic wrap. Let stand 10 minutes.
Serve: Rub off skins using paper towels. Halve peppers and discard seeds.
Scallions
Prep: Trim ends
Grill: Brush with olive oil; season with salt and pepper. Grill over medium-high until tender, about 4 minutes, turning once.
Mushrooms
Prep: Trim stems.
Grill: Brush with olive oil; season with salt and pepper. For portobellos, grill, cap side down, covered, over medium until tender, 10 to 15 minutes. Flip and cook 1 to 2 minutes more. For button mushrooms, grill over medium-high until tender, 12 minutes, turning occasionally.
Eggplant
Prep: Halve eggplant lengthwise, then cut into 1- to 1 1/2-inch wedges.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium, covered, until soft, 5 to 8 minutes, turning occasionally.
Tomatoes
Prep: Halve tomatoes crosswise.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium-high until grill marks appear, 8 to 10 minutes.
Yellow Squash and Zucchini
Prep: Cut lengthwise into 1/4-inch slices.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium-high until tender and grill marks appear, 6 to 8 minutes.
Corn
Prep: Cut corn on the cob crosswise into 2-inch pieces.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium-high until tender, 4 to 6 minutes, turning occasionally.
Fennel Bulbs
Prep: Trim and cut into 3/4-inch wedges.
Precook: Cook in boiling salted water until tender, about 8 minutes. Drain and pat dry.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium until grill marks appear, 8 to 10 minutes.
Russet Potatoes, Sweet Potatoes, and New Potatoes
Prep: For medium-size russet or sweet potatoes, cut lengthwise into 1/2-inch wedges. For new potatoes, cut in half.
Precook: Steam just until tender, 10 to 25 minutes. Let cool.
Grill: Brush with vegetable oil; season with salt and pepper. Grill over medium-high until heated through and grill marks appear, 2 to 3 minutes per side.
Carrots
Prep: Halve lengthwise (quarter if large).
Precook: Cook in boiling salted water until tender, about 6 minutes. Drain and pat dry.
Grill: Brush with olive oil; season with salt and pepper. Grill over medium until grill marks appear, 8 to 10 minutes.
Great Accents
You can sprinkle vegetables with salt, paprika, and thyme before grilling, or brush them with an herbed vinaigrette after they come off the grill.