Wash broccoli rabe; remove and discard woody stems. Coarsely chop the leafy greens; set aside.
In a 12-inch skillet cook and stir sweet pepper, basil, salt, and garlic in hot oil over medium-high heat for 2 minutes. Add broccoli rabe. Using tongs, toss and cook vegetables for 4 to 6 minutes or until broccoli rabe is crisp-tender. Transfer to serving dish. Sprinkle with crushed red pepper. Serve with lemon wedges.