In a medium saucepan, fry chopped bacon until crisp, about 3 minutes; remove from pan & blot on a paper towel. Saute mushrooms, onion & garlic in bacon drippings until softened.
Add peas, basil, lemon zest & 1 Tbsp oil. Season with salt & pepper.
In a bowl, combine shrimp, thyme, marjoram, rosemary, lavender & remaining tablespoon of oil. Add shrimp mixture to saucepan; cook, turning once, until opaque throughout, about 2-3 minutes. Place in a dish & set aside to keep warm.
In the saucepan, bring vegetable broth to a boil & add couscous. Cover saucepan & remove from heat; set aside until liquid has been absorbed, about 10 minutes.
Add shrimp mixture along with cooked bacon, lemon juice & tarragon. Gently stir together with a fork. Serve immediately.