In a medium saucepan, heat the olive oil over medium heat. Add the finely diced onion and sauté for about 5 minutes, or until the onions become translucent. Stir in the minced ginger and garlic, and cook for an additional 1-2 minutes until fragrant.
Sprinkle in the garam masala and kosher salt. Stir well to coat the onions, ginger, and garlic with the spices. Let it cook for another minute to bloom the spices and enhance their flavors.
Add the all-purpose flour to the pan and stir constantly for about 2 minutes to create a roux, helping to thicken your gravy.
Gradually pour in the low-sodium vegetable broth while whisking continuously to prevent lumps. Bring the mixture to a gentle simmer and allow it to thicken, about 5-7 minutes.
Once your gravy has thickened to your liking, taste it and adjust the seasoning with more salt if necessary. If it’s too thick, add a splash more broth until you reach the desired consistency.
