Heat a large saute pan over medium-high heat. Add oil. Add shallot and chopped chard stems. Sprinkle with salt, and saute 1-2 minutes, or until shallot is tender. Add garlic, and saute 30 seconds, or until fragrant. Add half of sliced chard leaves, and saute 1 minute, or until wilted. Add remaining chard leaves, and saute 1 minute more. Add cracked red pepper, salt and black pepper. Squeeze juice of 1/2 lemon into pan, and add raisins. Saute 1 minute, or until raisins are hot.