1. Peel carrots, and cut off tops to within 1 inch of carrot; cut in half lengthwise.
2. Place 1/4 teaspoon salt in a large saucepan of water; bring to a boil. Add carrots and peas; cook 3 minutes or until crisp-tender. Drain.
3. Melt butter in a large nonstick skillet over medium-high heat. Add vegetables, and cook 1 minute, stirring to coat. Stir in remaining 1/2 teaspoon salt, tarragon, and pepper; cook 1 minute. Remove from heat; stir in rind and juice.