How can I start down the path of eating less meat?
Further to my comment:

If you think of all of your meat-centric meals to be something like 60% meat, 40% (vegetables, carb filler) then just adjust the proportions.

If you have 300g steak and 200g vegetables on the side, then start by changing to a 200g steak and 300g vegetables, and keep adjusting as necessary.

Pasta with meat and vegetables, just put a bit less meat in and a bit more vegetables in. I used to do 500g dry pasta, 1kg meat, 1kg vegetables, but now I simply do unchanged 500g of pasta, with 600-800g meat, 1.2-1.4kg vegetables.

Your recipes don't actually have to change, as long as you don't go completely off the reservation. Once you cut out meat completely, or have very little of it, you may find your food lacking in flavour, and it's then that you will have to do something else to add more flavour back in. As long as you still want to have some meat in your food, you can keep doing what you've been doing, just adjusting the ratio of meat to vegetables.

Good luck!