Set oven to 400F.
Slice the top off the garlic bulb and rub the top with 1 teaspoon olive oil and add a pinch of sea salt. Wrap in foil. Add all ingredients to sheet pan and roast for 35 -40 minutes until soft.
Add to a pot along with water. Be sure to remove the stem from the fresno pepper and squeeze out the garlic cloves. Use an immersion to smooth everything together and bring to a gentle simmer and cover for 10 minutes. I like to add a bouillon cube as it simmers for deeper flavor. Lastly, fold in spinach and stir until wilted.
Serve immediately!