Simmer broth over medium heat while you prepare the risotto
In a large skillet, over medium heat, melt butter & oil. Add pancetta & onion & sauté until golden brown, ~10 min. Add celery and sauté 2-3 min
Add rice & stir, rake near to medium-high, pour in wine & stir briskly until absorbed. Add broth ½ cup at a time, stirring constantly, making sure it's fully absorbed before next addition (~40 mins). Taste rice to assess doneness, creaminess, not chalky. You may need more broth, if so, dilute remaining warm broth, keep warm
When just short of done (1 to 2 turns remaining) add beans with a broth addition stir, when it's done, add turn off heat, add parmesan, parsley, spinach, salt & pepper