Vue.js Use method in v-for

I want to run a method inside a v-for in my Vue component. Example:

<div v-for="(foo,index) in bar">
      <p>{{myMethod(foo,index)}}</p>
</div>

When I do this the p-tag just stays empty. Here is my method(with an axios call):

 myMethod:function(foo,index) {
    axios.get('/myAjaxCall')
    .then((response)=> {
        //works perfectly
        alert(response.data);
        return response.data;

    })
    .catch(function (error) {
        console.error(error);
    });
   },
 }

When I alert( SomethingWithFooAndIndex), the browser is showing exactly what I need. When I remove the axios call the method seems to work

Thanks!