Combine zucchini, 1 tsp olive oil, and a pinch of salt and pepper in small bowl and toss to coat; set aside. Make small tear at top of brown rice bag and microwave bag for 90 seconds. (TIP: You can also heat precooked brown rice and 1 tbsp water in small saucepan over medium-high heat. Cover and steam until warmed through, 3 to 4 minutes.)

Divide brown rice between serving bowls. Add zucchini, avocado, and dill. Top with pistachios and serve with tzatziki.