1. Cook pasta according to package directions, omitting salt and fat. Drain in a colander over a bowl, reserving 2/3 cup cooking liquid.
2. Heat a large nonstick skillet over medium-high heat. Add oil; swirl to coat. Add onion; cook 9 minutes or until lightly browned, stirring occasionally. Stir in garlic; cook 2 minutes or until garlic is lightly browned, stirring occasionally. Stir in edamame and peas; cook 2 minutes or until thoroughly heated. Add pasta, rind, juice, and butter; stir until butter melts. Remove pan from heat; stir in pecorino Romano cheese, mint, salt, and pepper. Stir in reserved 2/3 cup cooking liquid. Serve immediately.
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