Below is a table I made for you with most common vegetables and carbs per 100 g.
Green: veggies with less than 2.5 g carbs - you can eat in larger portions.
Yellow: between 2.5 g and 5 g carbs - OK, but eat in moderation.
Red: more than 5 g carbs - be careful. It's quite easy to eat 100 g or more when eating vegetables so keep it to small amounts.
Don't forget to use your common sense. Even though garlic contains 16 g carbs, most people only eat a few grams per serving, so using garlic is perfectly fine (and tasty).
Again: all values are per 100 g. Source: fineli.fi.