3tablespoonfreshly squeezed lemon juicemore if necessary
2tablespoonslukewarm wateror more for desired consistency
To make the chicken: Combine all ingredients except the chicken in a large bowl and mix thoroughly. Add the chicken and use your hands to coat each piece. Let marinate at least 4 hours (overnight preferred). Heat the grill (I used a grill pan) over medium-high heat and cook for 6-8 minutes (depending on the size of your pieces) or until cooked through.
To make the sauce: Place all the ingredients into a food processor and process until smooth. Add the water a little at a time to form a smooth, creamy sauce. More water may be needed depending on the thickness of your tahini paste. Taste and add more salt and lemon juice as necessary. Plate the chicken, drizzle tahini sauce on top and serve alongside rice, salad, pita bread, etc.