Roast (optional): Char whole peppers under the broiler or over a flame, turning until skins blister. Steam in a covered bowl 10 minutes, then peel, seed, pat dry, and cool completely.
Toast & prep: In a dry skillet over medium heat, toast walnuts 2–3 minutes until fragrant; cool. Pulse oats in the processor to fine crumbs; add ground flax and pulse to combine.
Bloom spices: Over low heat, warm 1 teaspoon EVOO with the garlic, Aleppo, and cumin for 30–45 seconds until aromatic; scrape into the processor.
Build the base: Add cooled peppers, remaining EVOO, chopped date, lemon juice, vinegar, and optional sumac. Pulse, then process until mostly smooth but not pasty.
Set the texture: Add the oat–flax mixture and pulse in short bursts until the dip thickens and holds gentle peaks.
Rest & finish: Let stand 10 minutes so oats/flax hydrate. Taste and adjust lemon (brightness), vinegar (tang), Aleppo (heat), and black pepper (bite). Spoon into a shallow bowl, swirl the surface, drizzle with EVOO, and garnish with chopped walnuts, a pinch of Aleppo, and mint. Serve warm pita or vegetables alongside.