OpportunityMenu.cmp
```xml
<aura:component implements="force:appHostable">
    <aura:dependency resource="markup://force:navigateToSObject" type="EVENT"/>
    <aura:handler name="init" value="{!this}" action="{!c.navHome}"/>
</aura:component>
```

OpportunityMenuController.js
```javascript
({
    navHome : function (component, event, helper) {
        var homeEvent = $A.get("e.force:navigateToObjectHome");
        homeEvent.setParams({
            "scope": "Opportunity"
        });
        homeEvent.fire();
    }
})
```