This was a tasty side dish. It's very similar to the asparagus with balsamic browned butter that we enjoyed, but I think the broccoli absorbed the buttery sauce better than the asparagus did. This was super fast and tasty and we would definitely make it again.
Broccoli with Balsamic-Butter Sauce
Place 1 lb broccoli spears in a microwave-safe dish; add 1 tbsp water. Cover with plastic wrap; vent. Microwave at HIGH 4 minutes or until crisp-tender; drain. Melt 1 Tbsp butter in a large nonstick skillet over medium-high heat. Add 2 Tbsp finely chopped shallots; saute 2 minutes. Remove from heat. Stir in 2 Tbsp balsamic vinegar, 1/4 tsp salt, and 1/4 tsp freshly ground pepper; drizzle over broccoli.