Step 1In a blender, combine the strawberry puree, sugar, mint, lemon grass, shallots, lemon juice and vinegar. Blend to a smooth consistency. Season with salt and pepper.
Step 1In a vegetable steamer, bring water to a boil over high heat. Reduce heat to simmer, place the artichokes in the steamer basket, cover and steam until a fork easily pierces the bottom of the heart at the stem, 25 to 35 minutes. Remove the artichokes and let cool. Break off the artichoke leaves to expose the fuzzy choke. Scrape away the choke with a spoon, leaving the heart. Cut off the stem and slice the artichoke heart into one-quarter-inch pieces.
Step 2Bring a pot of water to a boil over high heat. Add a little salt and the green beans. Blanch until the beans are done but still crisp, about 3 minutes. Drain in a colander and immediately plunge into a bowl of ice water to stop the cooking.
Step 3Combine the olive oil, lemon grass and garlic in a bowl. Add the scallops and mix well. Season with salt and pepper. Place a saute pan over high heat. When hot, add the scallop mixture and sear the scallops, turning once, until browned at the edges on both sides, about one minute per side. Transfer to a plate and keep warm.
Step 4Combine the artichoke hearts, green beans and chicory in a bowl and mix with 6 tablespoons of the vinaigrette. Divide the salad among 4 plates and top with the mango and radish sprouts. Arrange the scallops around the salad. Drizzle the plates with some of the remaining vinaigrette, or serve alongside (you will have some dressing left).