Soften dates: Place the dates in a small saucepan and cover with water. Bring to a gentle simmer and cook for 4 minutes to soften. Drain using a fine mesh strainer, then remove the pits.
Blend: Transfer the softened dates to a food processor. Add the vinegar, tomato paste, onion powder, garlic powder, coriander, allspice, cloves, tamari, and water. Blend until smooth, adding more water to reach your desired consistency. Season with salt to taste and blend once more.
Notes
Use whole dates with pits and remove the pits yourself; they tend to be fresher and offer a richer, more complex flavor than pre-pitted dates.Spices are optional, but a pinch of allspice, coriander, or cloves adds depth and warmth that takes the flavor to the next level.