Willow is deciduous tree which belongs to the family Salicaceae. This plant originates from China, but it can be found throughout the northern hemisphere (Europe, Asia and North America).Willow inhabits temperate areas that provide enough moisture and direct sunlight.illow trees have elongated leaves that are green on the upper side and whitish on the bottom side. Color of the leaves changes seasonally. Leaves turn from green to yellow in the autumn. Willow is deciduous plant, which means that it sheds its leaves each winter. Willow has extremely strong and well developed root.
Soak wooden skewers 20 to 30 minutes. Heat a grill to medium. Skewer the white and red onion slices, passing the skewer through each layer; skewer the green, red, orange, and yellow peppers. Place the skewered vegetables, olive oil, salt, and pepper in a shallow bowl, and turn the vegetables until they are coated. Place vegetables on grill, and cook until lightly charred, 6 to 8 minutes per side. Transfer vegetables to a cutting board. Cut peppers into 1/2-inch-thick slices, and remove skewers from onions. Transfer vegetables to a serving platter.
1 Put baking sheet in oven and allow peppers to roast for 20 minutes. 2  Remove baking sheet. 3  Using tongs, give the peppers a half turn, then place back in the oven for another 20 minutes.4  Check to make sure peppers have fully roasted. Wear a protective oven mitt. 2  Place peppers on the open grill or over a medium gas flame. 3  Let them roast for 15-20 minutes, using tongs to give them a quarter turn every few minutes, till the peppers are charred, soft and collapsing.