In medium size sauce pan, cook rice according to instructions on package. For my rice, I boiled the water. Then added the rice, covered with the lid, and reduced the heat to low. Rice took about 40 minutes to cook.
While rice is cooking, cook sweet potatoes in a large skillet. Put skillet on cooktop over medium-high heat. Heat oil until shimmering, then add sweet potatoes and a pinch of salt. Reduce heat to medium. Stir occasionally. Cook until tender and lightly browning on edges. Heat may need to be adjusted depending on your cooktop. Rice and sweet potatoes finish cooking about the same time. Remove from heat when cooked.
Add spinach to pan with sweet potatoes, stir lightly to combine. Spinach will wilt from residual heat in the pan, especially if using enameled cast iron as I did.
Using rice as the base, assemble the grain bowl in individual bowls or dishes. Toppings can be scattered over the top (as pictured) or clustered into little sections. Top rice with sweet potato and spinach mixture, sliced red onion, blueberries and pumpkin seeds.
To make the dressing, add all dressing ingredients in a blender. Blend until basil leaves are no longer intact, a couple minutes depending on your blender. Scape down sides as needed. Dressing will be green and homogenous. Drizzle dressing over top of grain bowl. Serve right away or refrigerate and enjoy later cold.