Sauté Aromatics: In a large skillet, heat the olive oil (or a splash of broth for oil-free) over medium heat. Add the onion and garlic, cooking until softened and fragrant, about 3-5 minutes.
Make the Creamy Base: Lower the heat and stir in the plant-based milk, miso paste, Dijon mustard, smoked paprika, and thyme. Stir well to combine and let it simmer for 3-4 minutes, allowing the flavors to meld.
Add the Beans: Gently fold in the cooked butter beans, ensuring they are coated in the creamy sauce. Simmer for 10-12 minutes, stirring occasionally, until the sauce thickens and the beans are heated through.
Add the Spinach: Take handfuls of spinach and incorporate well into the mix.
Finish with Lemon Juice: Stir in the lemon juice for brightness and adjust seasoning with salt and pepper to taste.
Serve: Garnish with fresh parsley if desired and serve warm. This dish pairs beautifully with crusty bread, steamed greens, or rice.