How do I ask out a female groupmate with our friends around?

So I (22M) want to ask out a female groupmate that I am interested in. I don’t get romantic interests often, and my previous relationship was nearly 3 years ago. I’ve never done this before, but since my romantic interests are so far and few between, I really want to shoot my shot before it’s too late.

So far, we have spent time in class and had a meal (as a group), and we talked quite a bit, so I know a little about her interests etc. but not enough to be considered “close”. Our collaboration will be ending in a month or so, so I feel that if I ask her out now, it wouldn’t have an effect on the project, since it’ll be over anyway.

I’ll probably approach her in real life and while having a conversation casually asks if she wants to go out for a coffee/for a meal. The problem is, I can’t find opportunities where it is just the two of us. This is because our project group consists of her (+ her good friend) and me (+ my good friend). As such, I don’t know how to find an opportunity to have a conversation where it is just us two. If anyone has suggestions on how to go about this would be greatly appreciated. Thanks!