Combine the ground beef with matzo meal, seltzer, eggs, and seasonings. Mix until combined and then use a small cookie scoop to make uniform-sized meatballs.
Roll the meatballs with your hands to make them smooth and then place the meatballs onto a parchment-lined baking sheet and bake at 350 degrees F for about 25-30 minutes.
Carrot and Onion Sauce
Wash and peel the carrots and cut them into bite size chunks. Wash the onion and rough chop it as well. Add both the carrots and onions to a saucepan and then cover with the water. Sprinkle with paprika and onion powder.
Cook on medium-high heat until the carrots and onions are soft and then puree the mixture.
Chicken
In a deep pan or a cast-iron skillet add the avocado oil and place it on medium high heat. Add the chicken to the pan and season with the seasonings.
Brown the chicken on both sides. Once both sides are browned add in the carrot and onion puree. Reduce to medium heat and finish cooking the chicken.
When the chicken is just about done add the meatballs and cook for another 5-10 minutes on medium low-heat.
Check the temperature of the chicken and the meatballs. The chicken should be 165 degrees F and we do the same temperature for the meatballs since they're with the chicken.