Trim stems of collard greens, keeping leaves whole. If necessary, trim the large vein of the stem (in center of leaf) so that it is flat with the leaf. Rinse leaves under cold water and then stack, still wet, starting with larger leaves on the bottom. Tightly roll stacks of leaves lengthwise, like a cigar. Slice crosswise as thinly as possible.

Heat dried peppers in skillet over medium heat for 3 minutes than add oil and red onions to saute for 3 minutes. Add garlic and stir until garlic is golden brown, 2-3 minutes. Add collard greens, saute with tongs so garlic and onions get tossed in with greens, until they start to wilt, about 1 minute. Add vinegar , salt, and pepper and continue sauteing until greens have all wilted and begin releasing their moisture, 2-3 minutes.

Transfer collards to a serving bowl. Season with more salt and pepper to taste and serve.