At that age you really don't have to add any additional ingredients to the vegetable puree. You can steam carrots, puree them and serve. Same with meats but i found my son liked meats best when mixed with fruits. so i would mix 1 cube of mango puree with 2 cubes of chicken puree and he loved that. Another good fruit to mix is apple. If you are adventurous, you could also make your own chicken soup stock and freeze. Chicken wings are the most economical way to make chicken soup stock, just water and carrots, sweet potato and boil for 3-4hrs, it's actually pretty easy!!
just a tip, the simpler your cooking, the easier it will be for you when your baby becomes a toddler. My 18mth old son still loves plain steamed carrots, broccoli, avocado, and Japanese pumpkin. No need to add any salt, sugar or special flavourings.
good luck!! just know that if your baby doesn't like something the first time, it's NOT YOUR COOKING!! lol it sometimes takes a few tries for baby to take to new foods. Someone already mentioned that wholesomebabyfoods website. It's a pretty good chart to follow in terms of what foods to introduce and in what order. I acutually printed it out and stuck it on my fridge so i always had it handy when grocery shopping for my son.
Good luck!!